spear, and certainly you, mr. clark, as well, what are you doing internally to prepare for possible driver displacement as a result of highly automated trucks? >> quite frankly, we don't view it as a displacement issue because we don't believe level five, no steering wheel, no pedals is imminent. what we're really focused on is driver assist technologies, not driverless. and if that's acceptable in this committee, then we're really talking about how do we enable drivers to be safer, more productive, their equipment more environmentally friendly, less congestion. these are all measurable returns that our fleets will invest in and are good for drivers as well. we'd like them to be less fatigued, better rested. if technology can play a role in that, that's good for the entire motoring public. but in terms of driver displacement, we already have a 50,000 driver shortage as it stands. if that trend continues, it will double in nine years. we have to hire over 960,000 employees over the next decade. into this industry.